Preparation method and application of Cu-Co catalyst to preparation of ethanol by synthetic gas
A technology for catalysts and ethanol production, which is applied in the direction of catalyst activation/preparation, preparation of organic compounds, chemical instruments and methods, etc. It can solve problems such as uneven distribution of active components of CuCo catalysts, and achieve the effect of improving activity
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Embodiment 1
[0030] Under the condition of T=65℃, 50ml of 0.5mol / L Cu(NO 3 ) 2 The solution was added dropwise to the NaHCO 3 0.5mol / L NaHCO 3 The pH of the solution was adjusted to maintain at 7.0. After the reaction was completed, it was aged for 0.5 h, filtered and washed 4 times, and then slurried. Then, under the conditions of T=60°C and slurry pH=8.0, 125ml of 0.05mol Co(NO 3 ) 2 Add it dropwise into the slurry liquid to carry out the metal ion exchange reaction. After the reaction is completed, place the precipitated mother liquor in a microwave chemical reactor, stir and age under microwave radiation at a temperature of 60°C for 0.5 hours, and then wash it with deionized water for 5 times. Dry at 80°C for 16 hours to obtain the precursor, and finally bake at 300°C for 5 hours to obtain the finished catalyst. The catalyst is composed of CuCo bimetal, and the Co / Cu molar ratio is 0.3.
[0031] Add 3g of Cu-Co catalyst into a 500ml reactor, reduce it at 0.2MPa 240°C for 6h, and ...
Embodiment 2
[0033] Under the condition of T=70℃, 250ml of 0.1mol / L Cu(CH 3 COO) 2 The solution was dripped dropwise into the K 2 CO 3 Add 0.3mol / L KOH solution to the 100ml mixed solution with pH = 7.5 and KOH at the same time to adjust the pH to 7.5. After the reaction is completed, it is aged for 1 hour, filtered and washed 5 times, and then slurried. Then, under the conditions of T=65°C and slurry pH=8.2, 212.5ml of 0.1mol Co(CH 3 COO) 2 Add it dropwise into the slurry liquid to carry out the metal ion exchange reaction. After the reaction is completed, place the precipitated mother liquor in a microwave chemical reactor, stir and age under microwave radiation temperature control at 70°C for 1 hour, and then wash it with deionized water for 6 times. Dry at 100°C for 14 hours to obtain the precursor, and finally bake at 400°C for 4 hours to obtain the finished catalyst. The catalyst is composed of CuCo bimetal with a Co / Cu molar ratio of 0.8.
[0034] Add 3g of Cu-Co catalyst into...
Embodiment 3
[0036] Under the condition of T=75℃, 500ml of 0.05mol / L CuSO 4 The solution was added dropwise into the NH 3 h 2 O and CH 3 0.1mol / L NH 3 h 2 The pH of the O solution was adjusted to maintain at 8.0. After the reaction was completed, it was aged for 0.8 h, filtered and washed 6 times, and then slurried. Then, under the conditions of T=70°C and slurry pH=8.4, 165ml of 0.3mol CoCl 2 Add it dropwise into the slurry liquid to carry out the metal ion exchange reaction. After the reaction is completed, place the precipitated mother liquor in a microwave chemical reactor, stir and age under microwave radiation temperature control at 80°C for 1.5 hours, and then wash it with deionized water for 7 times. Dry at 110°C for 12 hours to obtain the precursor, and finally bake at 500°C for 3 hours to obtain the finished catalyst. The catalyst is composed of CuCo bimetal with a Co / Cu molar ratio of 2.
[0037] Add 3g of Cu-Co catalyst to a 500ml reactor, reduce it at 0.2MPa 240°C for 6...
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